php-doc-en/reference/mysqli/functions/mysqli-multi-query.xml

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<refentry id="function.mysqli-multi-query">
 <refnamediv>
  <refname>mysqli_multi_query</refname>
  <refname>mysqli->multi_query</refname>
  <refpurpose>Performs a query on the database</refpurpose>
 </refnamediv>
 <refsect1>
  <title>Description</title>
  <para>Procedural style:</para>
  <methodsynopsis>
   <type>bool</type><methodname>mysqli_multi_query</methodname>
   <methodparam><type>mysqli</type><parameter>link</parameter></methodparam>
   <methodparam><type>string</type><parameter>query</parameter></methodparam>
  </methodsynopsis>
  <para>Object oriented style (method):</para>
  <classsynopsis>
   <ooclass><classname>mysqli</classname></ooclass>
   <methodsynopsis>
    <type>bool</type><methodname>multi_query</methodname>
    <methodparam><type>string</type><parameter>query</parameter></methodparam>
   </methodsynopsis>
  </classsynopsis>
  <para>
   The <function>mysqli_multi_query</function> executes one or multiple queries
   which are concatenated by a semicolon.
  </para>
  <para>
   To retrieve the resultset from the first query you can use
   <function>mysqli_use_result</function> or <function>mysqli_store_result</function>.
   All subsequent query results can be processed using
   <function>mysqli_more_results</function> and <function>mysqli_next_result</function>.
  </para>
 </refsect1>
 <refsect1>
  &reftitle.returnvalues;
  <para>
   <function>mysqli_multi_query</function> only returns &false; if the first statement failed.
   To retrieve subsequent errors from other statements you have to call
   <function>mysqli_next_result</function> first.
  </para>
 </refsect1>
 <refsect1>
  &reftitle.seealso;
  <para>
   <function>mysqli_use_result</function>,
   <function>mysqli_store_result</function>,
   <function>mysqli_next_result</function>&listendand;
   <function>mysqli_more_results</function>.
  </para>
 </refsect1>
 <refsect1>
  &reftitle.examples;
  <example>
   <title>Object oriented style</title>
   <programlisting role="php">
<![CDATA[
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");

/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

$query  = "SELECT CURRENT_USER();";
$query .= "SELECT Name FROM City ORDER BY ID LIMIT 20, 5";

/* execute multi query */
if ($mysqli->multi_query($query)) {
    do {
        /* store first result set */
        if ($result = $mysqli->store_result()) {
            while ($row = $result->fetch_row()) {
                printf("%s\n", $row[0]);
            }
            $result->close();
        }
        /* print divider */
        if ($mysqli->more_results()) {
            printf("-----------------\n");
        }
    } while ($mysqli->next_result());
}

/* close connection */
$mysqli->close();
?>
]]>
  </programlisting>
  </example>
  <example>
   <title>Procedural style</title>
   <programlisting role="php">
<![CDATA[
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");

/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

$query  = "SELECT CURRENT_USER();";
$query .= "SELECT Name FROM City ORDER BY ID LIMIT 20, 5";

/* execute multi query */
if (mysqli_multi_query($link, $query)) {
    do {
        /* store first result set */
        if ($result = mysqli_store_result($link)) {
            while ($row = mysqli_fetch_row($result)) {
                printf("%s\n", $row[0]);
            }
            mysqli_free_result($result);
        }
        /* print divider */
        if (mysqli_more_results($link)) {
            printf("-----------------\n");
        }
    } while (mysqli_next_result($link));
}

/* close connection */
mysqli_close($link);
?>
]]>
   </programlisting>
  </example>
  &example.outputs;
  <screen>
<![CDATA[
my_user@localhost
-----------------
Amersfoort
Maastricht
Dordrecht
Leiden
Haarlemmermeer
]]>
  </screen>
 </refsect1>
</refentry>

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